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# Index: I

I-beam pointer: 2.4.2. Using a Mouse with xterm Windows (Learning Unix)
i command (sed): 5.5. Append, Insert, and Change (sed & awk)
  10.5. Alphabetical Summary of sed Commands (Unix in a Nutshell)
-i grep option: 5.2.1. grep (Learning Unix)
[I, ]I (file search) commands (vim): 11.10.2.2. Include file searching (Learning the vi Editor)
\i, \I metacharacters: 11.7. Extended Regular Expressions (Learning the vi Editor)
i (insert) command: 2.1. vi Commands (Learning the vi Editor)
i-number (inodes): 14.2. How Unix Keeps Track of Files: Inodes (Unix Power Tools)
i-numbers
  deleting files by: 14.15. Removing a Strange File by its i-number (Unix Power Tools)
-i option: 6.5.3. Type and Attribute Options (Learning the Korn Shell)
  to grep command: 4.6. Command Substitution (Learning the Korn Shell)
  to typeset command: 6.5.3. Type and Attribute Options (Learning the Korn Shell)
-i option (elvis): 10.2. Important Command-Line Arguments (Learning the vi Editor)
-i option (vim): 11.2. Important Command-Line Arguments (Learning the vi Editor)
ibm values (lptype option): 10.10.1. Display Modes (Learning the vi Editor)
ic option: 6.3.3. Metacharacters Used in Replacement Strings (Learning the vi Editor)
  7.1.1. The :set Command (Learning the vi Editor)
ICA client, installing: 47.9.1. Citrix Metaframe (Unix Power Tools)
ICMP (Internet Control Message Protocol): 46.1. TCP/IP — IP Addresses and Ports (Unix Power Tools)
  46.1.2. Layer 4 Protocols: TCP, UDP, and ICMP (Unix Power Tools)
  diagnostic and traffic control messages: 46.1.2. Layer 4 Protocols: TCP, UDP, and ICMP (Unix Power Tools)
icons: 2.3.3. Window Manager Menus (Learning Unix)
  iconifying windows: 2.5.1. Using the Titlebar (Learning Unix)
  moving: 2.5.2. Moving Windows and Icons (Learning Unix)
  navigation, for resources shared with SMB network: 47.4. SWAT and GUI SMB Browsers (Unix Power Tools)
  text, setting for xterms: 5.15. Setting the Titlebar and Icon Text (Unix Power Tools)
  virtual desktops and: 2.6.2. Pagers and Virtual Desktops (Learning Unix)
iconv command: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
id command: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
IDE (Integrated Development Environment), Emacs as: 19.2. Emacs Features: A Laundry List (Unix Power Tools)
ident command (RCS): 19.5. Alphabetical Summary of Commands (Unix in a Nutshell)
identification keywords, SCCS: 18.4. Identification Keywords (Unix in a Nutshell)
identifiers: 24.3. Managing Processes: Overall Concepts (Unix Power Tools)
  (see also entries under identifier names)
  group ID (GID): 24.3. Managing Processes: Overall Concepts (Unix Power Tools)
  process ID (PID): 24.3. Managing Processes: Overall Concepts (Unix Power Tools)
  user IDs (UIDs): 24.3. Managing Processes: Overall Concepts (Unix Power Tools)
identity, Python objects: 42.3.3. Everything's an Object (Unix Power Tools)
if (! $?prompt) exit test: 3.9. Gotchas in set prompt Test (Unix Power Tools)
if command (awk): 11.10. Alphabetical Summary of Functions and Commands (Unix in a Nutshell)
  20.10.7. Alphabetical Summary of Commands (Unix Power Tools)
if command (csh): 5.8. Built-in C Shell Commands (Unix in a Nutshell)
if command (sh, ksh): 4.9. Built-in Commands (Bourne and Korn Shells) (Unix in a Nutshell)
if statement: 5.1. if/else (Learning the Korn Shell)
  6.2.3. Arithmetic Variables and Assignment (Learning the Korn Shell)
  6.5.2. String Formatting Options (Learning the Korn Shell)
  I/O redirection and: 7.2.3.2. I/O redirection and multiple commands (Learning the Korn Shell)
  syntax for: 5.1. if/else (Learning the Korn Shell)
if statements: 8.1. Conditional Statements (sed & awk)
  : used as do-nothing place filler: 36.6. The Unappreciated Bourne Shell ":" Operator (Unix Power Tools)
  debugging: 37.1.4. Missing or Extra esac, ;;, fi, etc. (Unix Power Tools)
  syntax for Bourne shell: 35.13. Test Exit Status with the if Statement (Unix Power Tools)
  test command, using with: 35.26. test: Testing Files and Strings (Unix Power Tools)
  testing exit status with: 35.13. Test Exit Status with the if Statement (Unix Power Tools)
  in xmessage command line: 36.26. Outputting Text to an X Window (Unix Power Tools)
if-then-else loops
  cgrep script, using in: 34.18. Searching for Patterns Split Across Lines (Unix Power Tools)
  csh aliases, use in: 29.9. How to Put if-then-else in a C-Shell Alias (Unix Power Tools)
  Perl scripts, using in: 41.6. Perl Boot Camp, Part 3: Branching and Looping (Unix Power Tools)
ifconfig tool: 44.1. Quick Introduction to Hardware (Unix Power Tools)
  44.8. Network Devices — ifconfig (Unix Power Tools)
  46.3. Status and Troubleshooting (Unix Power Tools)
if/else block, testing multiple conditionals in: 35.13. Test Exit Status with the if Statement (Unix Power Tools)
IFS (internal field separator) shell variable: 36.23.3. Using set and IFS (Unix Power Tools)
IFS shell variable: 4.3.3. Other Shell Variables (Unix in a Nutshell)
IFS variable: 4.2.1. Positional Parameters (Learning the Korn Shell)
  4.2.1.1. Positional parameters in functions (Learning the Korn Shell)
  7.3. Command-Line Processing (Learning the Korn Shell)
  read command and: 7.2.3. read (Learning the Korn Shell)
  role in command-line processing: 7.3.2. Substitution Order (Learning the Korn Shell)
ignorecase option: 7.1.4. Some Useful Options (Learning the vi Editor)
IGNORECASE variable (gawk): 11.2.3.8. Additional variables (sed & awk)
ignoreeof option: 3.3. Options (Learning the Korn Shell)
  customizations and: 10.2.3. Types of Global Customization (Learning the Korn Shell)
ignoreeof shell variable: 5.3.3. Predefined Shell Variables (Unix in a Nutshell)
ignoreeof variable: 4.19. Stop Accidental Bourne-Shell Logouts (Unix Power Tools)
ignoring filenames in ls command listing: 8.7. Some GNU ls Features (Unix Power Tools)
:ijump (:ij) command (vim): 11.10.2.2. Include file searching (Learning the vi Editor)
:ilist (:il) command (vim): 11.10.2.2. Include file searching (Learning the vi Editor)
ImageMagick: 9.4. X11-based Applications and Libraries (Mac OS X for Unix Geeks)
images, formatting in nroff/troff: 17.3. pic (Unix in a Nutshell)
#import directive: 5.1. Header Files (Mac OS X for Unix Geeks)
in operator: 8.4.2. Testing for Membership in an Array (sed & awk)
  11.1.8. Arrays (sed & awk)
@INC array (Perl): 41.2. Checking your Perl Installation (Unix Power Tools)
  module paths in: 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy (Unix Power Tools)
#include directive: 5.1. Header Files (Mac OS X for Unix Geeks)
include option (vim): 11.10.2.2. Include file searching (Learning the vi Editor)
increment (++) operator: 7.6. Expressions (sed & awk)
  7.6. Expressions (sed & awk)
incremental backups: 38.9. On-Demand Incremental Backups of a Project (Unix Power Tools)
:incremental-search command (vile): 12.8.5. Incremental Searching (Learning the vi Editor)
incremental searches in Emacs: 19.8. Rational Searches (Unix Power Tools)
incremental searching: 8.6.4. Incremental Searching (Learning the vi Editor)
  nvi editor: 9.8.5. Incremental Searching (Learning the vi Editor)
  vile editor: 12.8.5. Incremental Searching (Learning the vi Editor)
  vim editor: 11.8.5. Incremental Searching (Learning the vi Editor)
incsearch option (vim): 8.6.4. Incremental Searching (Learning the vi Editor)
  11.6. GUI Interfaces (Learning the vi Editor)
  11.8.5. Incremental Searching (Learning the vi Editor)
  11.10.2.1. Smart indenting (Learning the vi Editor)
indentation: 7.5.1. Indentation Control (Learning the vi Editor)
  in Bourne shell scripts with <<- operator: 27.16. Here Documents (Unix Power Tools)
  Perl script for text: 21.7. offset: Indent Text (Unix Power Tools)
  in Python scripts: 42.3.1. Indentation (Unix Power Tools)
  vim and (smart indenting): 11.10.2.1. Smart indenting (Learning the vi Editor)
indentation, emacs commands for: 7.2.12. Indentation Commands (Unix in a Nutshell)
  7.2.15. Basic Indentation Commands (Unix in a Nutshell)
index( ): 9.2. String Functions (sed & awk)
  9.2.1. Substrings (sed & awk)
index, array: 8.4. Arrays (sed & awk)
  8.4.1. Associative Arrays (sed & awk)
index command (awk): 20.10.7. Alphabetical Summary of Commands (Unix Power Tools)
index, formatting (example program): 12.2. Generating a Formatted Index (sed & awk)
index function (awk): 11.10. Alphabetical Summary of Functions and Commands (Unix in a Nutshell)
index (message) screens for newsgroups: 6.6. Usenet News (Learning Unix)
indexed arrays: 6.4.1. Indexed Arrays (Learning the Korn Shell)
indexes
  Bourne shell arrays: 9.23.1. Using the Stored Lists (Unix Power Tools)
  C shell arrays: 9.23.1. Using the Stored Lists (Unix Power Tools)
  hashes: 41.5.3. Hashes (Unix Power Tools)
indirect variable references: 4.4. Indirect Variable References (namerefs) (Learning the Korn Shell)
industrial strength backups: 38.14. Industrial Strength Backups (Unix Power Tools)
indxbib command: 17.4.3. Alphabetical Summary of Commands (Unix in a Nutshell)
inequality
  != operator: 41.5.1. Scalars (Unix Power Tools)
  ne operator: 41.5.1. Scalars (Unix Power Tools)
inetd daemon: 46.5. The Director of Operations: inetd (Unix Power Tools)
  disabling for security reasons: 48.10. Disabling inetd (Unix Power Tools)
  Expect scripts with: 28.18.4. Other Problems (Unix Power Tools)
  running Samba daemons: 47.2. Installing and Configuring Samba (Unix Power Tools)
infinite loops
  tail -f command, creating with: 12.10. How to Look at Files as They Grow (Unix Power Tools)
infinite undo facility: 8.6.3. Infinite Undo (Learning the vi Editor)
  elvis editor: 10.8.3. Infinite Undo (Learning the vi Editor)
  nvi editor: 9.8.3. Infinite Undo (Learning the vi Editor)
  vile editor: 12.8.3. Infinite Undo (Learning the vi Editor)
  vim editor: 11.8.3. Infinite Undo (Learning the vi Editor)
info command: 2.9. The info Command (Unix Power Tools)
.info files, for Fink packages: 6.2.3. Creating the .info File (Mac OS X for Unix Geeks)
info program: 8.1.2. The info Command (Learning Unix)
info pseudo-command (sccs): 18.7.2. Pseudo-Commands (Unix in a Nutshell)
Info.plist file, kernel extension and: 2.1.1. The BootX Loader (Mac OS X for Unix Geeks)
InfoZIP format: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
inheritance
  process information: 24.3. Managing Processes: Overall Concepts (Unix Power Tools)
  variables: 35.9. Shell Variables (Unix Power Tools)
_ _init_ _( ) method (Python classes): 42.3.3. Everything's an Object (Unix Power Tools)
INIT procedure (tawk): 11.3.2.1. Tawk language extensions (sed & awk)
init process: 2.1.3. The rc Scripts (Mac OS X for Unix Geeks)
init program: 23.1. Job Control in a Nutshell (Unix Power Tools)
  23.2.1. How Job Control Works (Unix Power Tools)
  24.2. fork and exec (Unix Power Tools)
  collecting child processes after parent exits: 24.19. Why You Can't Kill a Zombie (Unix Power Tools)
initialization: 2.1.2. Initialization (Mac OS X for Unix Geeks)
  elvis editor: 10.4. Initialization (Learning the vi Editor)
  nvi editor: 9.4. Initialization (Learning the vi Editor)
  vile editor: 12.4. Initialization (Learning the vi Editor)
  vim editor: 11.4. Initialization (Learning the vi Editor)
initialization files (Emacs): 19.3. Customizations and How to Avoid Them (Unix Power Tools)
initializing new cvsroot: 39.7. CVS Basics (Unix Power Tools)
inline assembly code: 4.3. Architectural Issues (Mac OS X for Unix Geeks)
inodes: 10.2. What's Really in a Directory? (Unix Power Tools)
  14.2. How Unix Keeps Track of Files: Inodes (Unix Power Tools)
  -ctime (change time) operator, using with find: 9.5. Searching for Old Files (Unix Power Tools)
  file permissions in: 50.2.1. User, Group, and World (Unix Power Tools)
  i-numbers for parent directory entries: 10.4.2. Links to a Directory (Unix Power Tools)
  information in: 14.2. How Unix Keeps Track of Files: Inodes (Unix Power Tools)
  ls -c command for: 8.3. Finding Oldest or Newest Files with ls -t and ls -u (Unix Power Tools)
  ls -i command, listing number for each directory entry: 10.4.1. Differences Between Hard and Symbolic Links (Unix Power Tools)
  tar utility and: 38.2. tar in a Nutshell (Unix Power Tools)
inodes, reporting on: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
input (see input/output standard input)
  2.2. Command-Line Syntax (sed & awk)
  43.1. Using Standard Input and Output (Unix Power Tools)
  assigning to variables: 10.1.2. Assigning the Input to a Variable (sed & awk)
  getline function: 10.1. The getline Function (sed & awk)
input events: 6.4. X Event Translations (Unix Power Tools)
input focus, setting: 2.3.1. Setting Focus (Learning Unix)
input mode: 2.4. Vi Editing Mode (Learning the Korn Shell)
  entering: 2.4.2. Entering and Changing Text (Learning the Korn Shell)
input modes, setting: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
input redirection operator (<): 5.1. Standard Input and Standard Output (Learning Unix)
input/output (I/O): 1.5. Programs Are Designed to Work Together (Unix Power Tools)
  (see also standard error; standard input; stardard output)
  checking statistics for security problems: 48.6.4. Other Checks (Unix Power Tools)
  find command -print0 option: 9.9. Running Commands on What You Find (Unix Power Tools)
  output from at command, quieting: 25.6. Making Your at Jobs Quiet (Unix Power Tools)
  output from background jobs, stopping: 23.9. Stop Background Output with stty tostop (Unix Power Tools)
  output from command, sending to nohup.out file: 23.10. nohup (Unix Power Tools)
  piping shell loop output to pager: 2.4. Searching Online Manual Pages (Unix Power Tools)
  Python: 42.3.5. I/O and Formatting (Unix Power Tools)
  redirecting (see redirecting input and output)
  redirecting for programs: 36.15. Overview: Open Files and File Descriptors (Unix Power Tools)
  stopped terminal output, debugging: 5.6.1. Output Stopped? (Unix Power Tools)
input/output redirection: 5.1. Standard Input and Standard Output (Learning Unix)
  creating files: 4.3. Creating and Editing Files (Learning Unix)
INPUTRC environment variable: 35.5. Predefined Environment Variables (Unix Power Tools)
inputrc file, customizing bash editing in: 30.14.5. bash Editing (Unix Power Tools)
inputtab option (elvis): 10.8.1. Command-Line History and Completion (Learning the vi Editor)
insert command (see i command (sed))
insert command (ex): 9.2. Alphabetical Summary of ex Commands (Unix in a Nutshell)
  20.4. Useful ex Commands (Unix Power Tools)
insert mode
  completion in (vim): 11.8.1. Command-Line History and Completion (Learning the vi Editor)
  mapping keys for: 7.3.6. Mapping Keys for Insert Mode (Learning the vi Editor)
  mode indicators: 8.6.7. Mode Indicators (Learning the vi Editor)
  word abbreviations: 7.3.1. Word Abbreviation (Learning the vi Editor)
insert mode for pasting text: 5.13. Simple Copy and Paste in xterm (Unix Power Tools)
insert mode : (unixnut) 8.1.3. Insert Mode (Learning the vi Editor)
insert submode (vi mode): 1.5.3.2. vi mode (Mac OS X for Unix Geeks)
inserting text: 2.4. More Ways to Insert Text (Learning the vi Editor)
  a (append) command: 2.3. Simple Edits (Learning the vi Editor)
    2.3.2. Appending Text (Learning the vi Editor)
  handling long insertions: 2.3.8.1. Repeat (Learning the vi Editor)
    7.3.5. More Examples of Mapping Keys (Learning the vi Editor)
    8.6.2. Arbitrary Length Lines and Binary Data (Learning the vi Editor)
    elvis editor: 10.8.4. Arbitrary Length Lines and Binary Data (Learning the vi Editor)
    nvi editor: 9.8.4. Arbitrary Length Lines and Binary Data (Learning the vi Editor)
    vile editor: 12.8.4. Arbitrary Length Lines and Binary Data (Learning the vi Editor)
    vim editor: 11.8.4. Arbitrary Length Lines and Binary Data (Learning the vi Editor)
  in insert mode: 1.1.3. Modus Operandi (Learning the vi Editor)
    2.1. vi Commands (Learning the vi Editor)
  repeating insert with CTRL-@: 2.3.8.1. Repeat (Learning the vi Editor)
insertion mode (Emacs): 19.5. Putting Emacs in Overwrite Mode (Unix Power Tools)
INSTALL file: 4.2.1. The First Line of Defense (Mac OS X for Unix Geeks)
  4.2.1. The First Line of Defense (Mac OS X for Unix Geeks)
installation levels (Solaris): 1.2.1. Solaris Installation Levels and Bundling (Unix in a Nutshell)
installer tool: 1.6.3. Macintosh Tools (Mac OS X for Unix Geeks)
installing, Python: 42.2. Installation and Distutils (Unix Power Tools)
installing Perl: 41.3. Compiling Perl from Scratch (Unix Power Tools)
installing software: 40.1. /usr/bin and Other Software Directories (Unix Power Tools)
  challenges of: 40.2. The Challenges of Software Installation on Unix (Unix Power Tools)
  curl application, using: 40.8. The curl Application and One-Step GNU-Darwin Auto-Installer for OS X (Unix Power Tools)
  Debian apt-get tool, using: 40.6. Installing Software with Debian's Apt-Get (Unix Power Tools)
    configuring sources.list file: 40.6.1. Configuring the sources.list File (Unix Power Tools)
  Debian dselect tool, using: 40.5. Using Debian's dselect (Unix Power Tools)
    access method, choosing: 40.5.1. Choosing the Access Method (Unix Power Tools)
    choosing packages for installation or removal: 40.5.3. Choosing Packages for Installation or Removal (Unix Power Tools)
    configuring packages: 40.5.6. Configuring Packages (Unix Power Tools)
    exiting: 40.5.8. Exiting dselect (Unix Power Tools)
    exiting select function: 40.5.4. Exiting the Select Function (Unix Power Tools)
    installing packages: 40.5.5. Installing Packages (Unix Power Tools)
    removing packages: 40.5.7. Removing Packages (Unix Power Tools)
    updating information on available packages: 40.5.2. Updating Information on Available Packages (Unix Power Tools)
  FreeBSD packages, using: 40.10. Installing with FreeBSD Packages (Unix Power Tools)
  FreeBSD Ports, using: 40.9. Installation with FreeBSD Ports (Unix Power Tools)
  GNU wget utility, using: 40.7. Interruptable gets with wget (Unix Power Tools)
  make utility, problems with differing versions: 40.3. Which make? (Unix Power Tools)
  RPM, using: 40.11. Finding and Installing RPM Packaged Software (Unix Power Tools)
  simplifying the make process: 40.4. Simplifying the make Process (Unix Power Tools)
  /usr/bin and other directories for: 40.1. /usr/bin and Other Software Directories (Unix Power Tools)
instance of an object, application resources associated with: 6.3. X Resource Syntax (Unix Power Tools)
instance variables (Python): 42.3.3. Everything's an Object (Unix Power Tools)
instances of Python classes: 42.3.3. Everything's an Object (Unix Power Tools)
instant messenger program, starting up automatically: 2.2.1. Login Preferences (Mac OS X for Unix Geeks)
instructions, awk: 2.4.1. Running awk (sed & awk)
int( ): 9.1.2. Integer Function (sed & awk)
int command (awk): 20.10.7. Alphabetical Summary of Commands (Unix Power Tools)
int function (awk): 11.10. Alphabetical Summary of Functions and Commands (Unix in a Nutshell)
INT (interrupt) signal: 24.10. What Are Signals? (Unix Power Tools)
  killing processes waiting for NFS resources: 24.12. Destroying Processes with kill (Unix Power Tools)
  sending with CTRL-c command: 24.11. Killing Foreground Jobs (Unix Power Tools)
INT signal: 8.3.1. Control-Key Signals (Learning the Korn Shell)
  8.4.2. Process ID Variables and Temporary Files (Learning the Korn Shell)
  trap on: 8.4.1. Traps and Functions (Learning the Korn Shell)
integer command: 4.9. Built-in Commands (Bourne and Korn Shells) (Unix in a Nutshell)
integer comparison operators: 5.1.4.4. Arithmetic conditionals (Learning the Korn Shell)
Integrated Development Environment (IDE), Emacs as: 19.2. Emacs Features: A Laundry List (Unix Power Tools)
intelligent terminals: 2.3.1. Inserting New Text (Learning the vi Editor)
interactive command-line editing: 30.1. The Lessons of History (Unix Power Tools)
  30.14. Shell Command-Line Editing (Unix Power Tools)
  bash: 30.14.5. bash Editing (Unix Power Tools)
  Emacs editing mode: 30.14.2. Emacs Editing Mode (Unix Power Tools)
  ksh (Korn shell): 30.14.4. ksh Editing (Unix Power Tools)
  tcsh shell: 30.14.3. tcsh Editing (Unix Power Tools)
  vi editing mode: 30.14.1. vi Editing Mode (Unix Power Tools)
  zsh shell: 30.14.6. zsh Editing (Unix Power Tools)
interactive commands: 1.4. Communication with Unix (Unix Power Tools)
interactive conversation: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
  B.2. Alphabetical Summary of Commands (Unix in a Nutshell)
interactive logins
  starting remote X clients from: 6.10.1. Starting Remote X Clients from Interactive Logins (Unix Power Tools)
interactive mode for shells: 27.3.2. Interactive Use Versus Shell Scripts (Unix Power Tools)
interactive programs
  controlling with Expect program: 28.18. Expect (Unix Power Tools)
  nice command and: 26.6. A nice Gotcha (Unix Power Tools)
  testing with Expect: 28.18.3. Testing: A Story (Unix Power Tools)
interactive renaming of files: 10.10. Renaming a List of Files Interactively (Unix Power Tools)
interactive shells: 3.4. Login Shells, Interactive Shells (Unix Power Tools)
  3.4.2. Interactive Shells (Unix Power Tools)
  3.4.2. Interactive Shells (Unix Power Tools)
  Bourne shell
    ENV environment variable: 3.3. Shell Setup Files — Which, Where, and Why (Unix Power Tools)
  setup files, reading at different times: 3.8. Setup Files Aren't Read When You Want? (Unix Power Tools)
interactive spell checking: 16.2. Check Spelling Interactively with ispell (Unix Power Tools)
interactive use of shells: 3.2.1. Interactive Use (Unix in a Nutshell)
interation in loops: 31.6. Loop Control: break and continue (Unix Power Tools)
Interface Builder: 4. Compiling Source Code (Mac OS X for Unix Geeks)
interfaces for vi clones: 8.3. GUI Interfaces (Learning the vi Editor)
  elvis editor: 10.6. GUI Interfaces (Learning the vi Editor)
    display modes: 10.9.2. Syntax Highlighting (Learning the vi Editor)
      10.10.1. Display Modes (Learning the vi Editor)
  vile editor: 12.6. GUI Interfaces (Learning the vi Editor)
  vim editor: 11.6. GUI Interfaces (Learning the vi Editor)
intergers in Perl: 41.5. Perl Boot Camp, Part 2: Variables and Data Types (Unix Power Tools)
Interleaf files, converting: 6.1.1.1. Converting an Interleaf file (sed & awk)
internal commands: 1.9. Internal and External Commands (Unix Power Tools)
internal field separator (see IFS variable)
internal field separator (IFS) shell variable: 36.23.3. Using set and IFS (Unix Power Tools)
internationalization: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
  2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
internationizational support
  elvis editor: 10.10. Interesting Features (Learning the vi Editor)
  nvi editor: 9.10. Interesting Features (Learning the vi Editor)
Internet: 7.1.1. Here-Documents (Learning the Korn Shell)
  2.5.4. Stacking Windows (Learning Unix)
  6. Using the Internet and Other Networks (Learning Unix)
  1.21. Unix Networking and Communications (Unix Power Tools)
Internet Control Message Protocol (see ICMP)
Internet directory, searching: B.2. Alphabetical Summary of Commands (Unix in a Nutshell)
Internet Message Access Protocol (IMAP): 46.8. Mail — SMTP, POP, and IMAP (Unix Power Tools)
Internet Protocol (IP): 46.1. TCP/IP — IP Addresses and Ports (Unix Power Tools)
Internet Relay Chat (IRC): 6.7.2. IRC (Learning Unix)
Internet, vi and: E. vi and the Internet (Learning the vi Editor)
interoperability, POSIX standard: 1.3. The Core of Unix (Unix Power Tools)
interpolating variables: 41.4. Perl Boot Camp, Part 1: Typical Script Anatomy (Unix Power Tools)
interpretation of commands by shells (see commands)
interpreted languages: 42.1. What Is Python? (Unix Power Tools)
interpreted programs: 7.2.1. ps (Learning Unix)
interpreter, Python: 42.2. Installation and Distutils (Unix Power Tools)
interpreter, perl: 41.2. Checking your Perl Installation (Unix Power Tools)
interprocess communication facilities: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
interprocess communication (IPC): 8.3. Signals (Learning the Korn Shell)
interrupt characters: 1.1.8. Correcting a Command Line (Learning Unix)
  1.4. The Unresponsive Terminal (Learning Unix)
interrupt characters, setting: 5.8. Setting Your Erase, Kill, and Interrupt Characters (Unix Power Tools)
interrupting commands
  in a string of commands separated by semicolons: 28.16. Separating Commands with Semicolons (Unix Power Tools)
interrupting jobs: 23.9. Stop Background Output with stty tostop (Unix Power Tools)
interrupts
  shell scripts, trapping exits caused by: 35.17. Trapping Exits Caused by Interrupts (Unix Power Tools)
interrupts, latency utility for measuring: 8.1.3. latency (Mac OS X for Unix Geeks)
intr key: 5.8. Setting Your Erase, Kill, and Interrupt Characters (Unix Power Tools)
intruder detection: 48.7. Intruder Detection (Unix Power Tools)
-inum operator (findcommand): 9.24. Finding the (Hard) Links to a File (Unix Power Tools)
-inum operator(find command): 9.9. Running Commands on What You Find (Unix Power Tools)
  14.15. Removing a Strange File by its i-number (Unix Power Tools)
invalid symbolic links: 10.6. Stale Symbolic Links (Unix Power Tools)
"inverse if" statement: 35.13. Test Exit Status with the if Statement (Unix Power Tools)
  35.14. Testing Your Success (Unix Power Tools)
invisible files: 14.16. Problems Deleting Directories (Unix Power Tools)
invocation options: B.1. Invocation Options (Learning the Korn Shell)
invoking the shell: 4.7. Invoking the Shell (Unix in a Nutshell)
  5.7. Invoking the Shell (Unix in a Nutshell)
invoking vi: 1.1.1. Opening a File (Learning the vi Editor)
  command-line options: 4.2. Options When Starting vi (Learning the vi Editor)
    A. Quick Reference (Learning the vi Editor)
  on multiple files: 5.5.1. Invoking vi on Multiple Files (Learning the vi Editor)
I/O (see input; output)
  2.2. Command-Line Syntax (sed & awk)
  background jobs and: 1.8.1. Background I/O (Learning the Korn Shell)
  break conditions and: 9.2.3.4. Break conditions (Learning the Korn Shell)
  file redirection and: 6.2.3. Arithmetic Variables and Assignment (Learning the Korn Shell)
  two-way pipes and: 8.5.4. Coroutines with Two-Way Pipes (Learning the Korn Shell)
I/O-bound processes: 26.1. Timing Is Everything (Unix Power Tools)
  nice command, effect of: 26.5. Know When to Be "nice" to Other Users...and When Not To (Unix Power Tools)
I/O (input/output) redirection: 5.1. Standard Input and Standard Output (Learning Unix)
  creating files: 4.3. Creating and Editing Files (Learning Unix)
I/O processing commands (sed): 10.4.3. Input/Output Processing (Unix in a Nutshell)
I/O redirection: 1.7.2. I/O Redirection (Learning the Korn Shell)
  7.1. I/O Redirectors (Learning the Korn Shell)
  order of in command-line processing: 7.3.2. Substitution Order (Learning the Korn Shell)
  restricted shell and: 10.4.2. Restricted Shell (Learning the Korn Shell)
  to code blocks: 7.2.3.3. Code blocks (Learning the Korn Shell)
  to multiline flow-control constructs: 7.2.3.2. I/O redirection and multiple commands (Learning the Korn Shell)
  to/from file descriptors for: 7.1. I/O Redirectors (Learning the Korn Shell)
    7.1.3. File Descriptors (Learning the Korn Shell)
    7.2.3.4. Reading user input (Learning the Korn Shell)
    7.2.3.5. Options to read (Learning the Korn Shell)
  with exec statement: 9.2.1.2. exec (Learning the Korn Shell)
IP addresses, managing: 3.9. Managing Hostnames and IP Addresses (Mac OS X for Unix Geeks)
IP Control Message Protocol (see ICMP)
IP (Internet Protocol)
  addresses
    DHCP and: 46.10. Dynamic Host Configuration Protocol (DHCP) (Unix Power Tools)
    displaying with dig: 46.3. Status and Troubleshooting (Unix Power Tools)
    mapping hostnames to: 46.9. Domain Name Service (DNS) (Unix Power Tools)
    network devices: 44.8. Network Devices — ifconfig (Unix Power Tools)
    private network addresses and: 46.11. Gateways and NAT (Unix Power Tools)
  addresses and ports: 46.1. TCP/IP — IP Addresses and Ports (Unix Power Tools)
    addresses: 46.1.1. Internet Protocol (IP) (Unix Power Tools)
    ports: 46.1.2. Layer 4 Protocols: TCP, UDP, and ICMP (Unix Power Tools)
  IP masquerading on Linux: 46.11. Gateways and NAT (Unix Power Tools)
  TCP, UDP, and ICMP with: 46.1.2. Layer 4 Protocols: TCP, UDP, and ICMP (Unix Power Tools)
  Version 4 (IPv4): 46.1.1. Internet Protocol (IP) (Unix Power Tools)
ipconfig command: B. Command-Line Tools: The Missing Manpages (Mac OS X for Unix Geeks)
ipcrm command: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
ipcs command: 2.1. Alphabetical Summary of Commands (Unix in a Nutshell)
IRC (Internet Relay Chat): 6.7.2. IRC (Learning Unix)
irc utility: 1.21. Unix Networking and Communications (Unix Power Tools)
IRIX systems
  restricted shell (rsh): 6.10.2. Starting a Remote Client with rsh and ssh (Unix Power Tools)
isc-dhcpd daemon: 46.10. Dynamic Host Configuration Protocol (DHCP) (Unix Power Tools)
:isearch (:is) command (vim): 11.10.2.2. Include file searching (Learning the vi Editor)
isfname option (vim): 11.7. Extended Regular Expressions (Learning the vi Editor)
isident option (vim): 11.7. Extended Regular Expressions (Learning the vi Editor)
  11.7. Extended Regular Expressions (Learning the vi Editor)
iskeyword option (vim): 11.7. Extended Regular Expressions (Learning the vi Editor)
ismpx command: B.2. Alphabetical Summary of Commands (Unix in a Nutshell)
  B.2. Alphabetical Summary of Commands (Unix in a Nutshell)
  (see also layers command)
ispell program: 16.2. Check Spelling Interactively with ispell (Unix Power Tools)
:isplit (:isp) command (vim): 11.10.2.2. Include file searching (Learning the vi Editor)
isprint option (vim): 11.7. Extended Regular Expressions (Learning the vi Editor)
iterating
  through arrays: 41.5.2. Arrays (Unix Power Tools)
  through key-value pairs in hashes: 41.5.3. Hashes (Unix Power Tools)
  through list elements with foreach: 41.6. Perl Boot Camp, Part 3: Branching and Looping (Unix Power Tools)
iterating shell variables over arguments: 37.5. Quoting and Command-Line Parameters (Unix Power Tools)

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